The universe is apparently filled with particles and anti-particles dancing into and out of existence. Are they for real? In this week's "Ask a Physicist," we'll find out.
Several readers took my previous Crackpot column as an invitation. To you, I say, "bravo!" If you want to send me a question about the universe in the hopes of internet fame or just to see if I'll read your anti-Einstein manifesto, please email me.